I just recently updated my (given to me last year) mac mini. After the update install my MM boots but the video only comes on every 30 seconds or so and only for about a second. Do you think if I reinstalled the OS that this might go away or is there another way to fix this?

Tried booting into safe mode (shift key) but i still get the screen with the apple, get the loading thingy on the screen and after a few seconds the screen goes black and the system continues to load. I know this cause every few seconds i'll get a glimpse of the screen and can see the desktop complete with icons.

I'm not sure what else to do? I don't have a copy of the OS anywhere I normally use PC.

So mt mac mini was in safe mode one day and then seemed to have restarted in regular mode and back to the really intermittent video problem.
I've been trying to boot into safe mode for the past week but to no avail. I might just install Ubuntu cause Mac just doesn't make it that easy to get a new OS installed.